M42: Orion Nebula


M42: Orion Nebula in Narrowband

Object Data

Object type: Emission Nebula
Size: About 24 light years across
Magnitude: 4
Constellation: Orion
Distance: 1,344 light years

Exposure Data

Date: 11/24-11/25/21
Location: Backyard Observatory, Carlsbad, CA
Telescope: Williams Optics Star 71, 5-element.  350mm at f/4.9
Camera: QSI 683 wgs with  Astronomik Ha and SII (6nm) and Antila OIII (3nm) emission-line filters.
Mount: Losmandy G-11 Gemini I
Exposure time: Ha:10 x 15 min; SII 7 x 15 min; OIII 8 x 15 min
Exposure time total: 6.25 hrs
Color mapped using the Hubble Palette by assigning Ha to Green, OIII to Blue and SII to Red.  A single 15-minute SII subexposure was added as a lum layer to bring out the details in the trapezium.

FOV = 77 x 84 arcmin  (cropped to 70% of original)
Image Scale: 3.21"/pixel



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